Engineered for robust performance, this M8 x 138mm carbon steel hex head cap screw offers exceptional tensile strength and durability. Its precise dimensions ensure secure and reliable fastening in critical industrial assemblies.
| Standard | DIN 933 |
| Material | Carbon Steel |
| Finish | Galvanized |
| Grade | N/A |
| Size | M8 |
| Length | 138mm |
| Head Width | 26mm |
Precision-manufactured to tight tolerances, this M8 x 138mm hex head cap screw is constructed from high-grade carbon steel, providing superior tensile and shear strength for demanding applications. The M8 thread size ensures compatibility with standard metric components, while the 138mm length offers significant reach for joining thicker materials or accommodating greater assembly depths. The substantial 26mm head width allows for the application of high torque, facilitating secure and reliable connections. This fastener is designed to withstand significant mechanical stress and vibration, making it suitable for use in heavy machinery, structural assemblies, and demanding industrial environments where consistent performance is paramount.
This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.
1. Select the appropriate wrench or socket size to engage the hex head securely. 2. Thread the cap screw into the pre-tapped hole or mating fastener, ensuring smooth engagement without cross-threading. 3. Apply torque according to design specifications using a calibrated torque wrench, ensuring consistent tension across all fasteners in the assembly.
| Standard System | Designation |
|---|---|
| ISO Equivalent | ISO 898-1 / ISO 4014 |
| DIN Equivalent | DIN 931 / DIN 933 |
| Primary Standard | DIN 933 |
| Tensile Strength | Standard Commercial Spec |
| Yield Strength | Standard Commercial Spec |
| Hardness | Varies by specific batch |
| Carbon (C) | 0.28 - 0.55% |
| Manganese (Mn) | 0.60 - 0.90% |
| Phosphorus (P) | 0.04% max |
| Sulfur (S) | 0.05% max |
| Bolt Size | Dry Torque (ft-lbs) | Lubricated Torque (ft-lbs) |
|---|---|---|
| M8 | Check Calculator | Reduce by 25% |
| Size / Type | Est. Weight (lbs/100) | Shipping Weight (kg) |
|---|---|---|
| M8 | Varies by dimension | Contact Sales |
| Environment | Rating |
|---|---|
| Indoor / Dry | Excellent |
| Outdoor / Exposed | Excellent |
| Marine / Saltwater | Not Recommended |
| Chemical / Acidic | Not Recommended |
| ❌ Mistake | ✅ Correct Approach |
|---|---|
| Over-tightening the cap screw, leading to thread stripping or component deformation. | Always use a calibrated torque wrench and adhere to the recommended torque specifications for the application. |
| Using the wrong size wrench or socket, which can damage the hex head and lead to improper torque application. | Ensure the wrench or socket size precisely matches the hex head dimensions of the cap screw for optimal engagement. |
A: This Hex Head Cap Screw, Carbon Steel is manufactured from Carbon Steel.
A: Heavy machinery assembly, Structural steel fabrication, Automotive and aerospace component mounting.
Conversion factor: 1 ft-lb ≈ 1.356 Nm
| Status | Mating Component | Standard | Torque Spec | Engineering Notes |
|---|---|---|---|---|
| No verified compatibility data found for this component. | ||||